Support ubuntu 24.04 image

Package qemu no longer exists, but only qemu-user-static was required.
Also add support for RaspberryPi 5 emulation with a specific cpu_info to be
used on ubuntu-22.04 and cortex-a76 to be used on ubuntu-24.04.
Clarified that cpu_info is effectless with qemu 8.2+.
Also allow custom qemu.

Fix #90

Signed-off-by: Paul Guyot <pguyot@kallisys.net>

.github/workflows/test-cpu_info.yml

@@ -85,5 +85,37 @@ jobs:
             cat /proc/cpuinfo > cpuinfo.txt
     - name: Test content of cpuinfo
       run: |
+        cat cpuinfo.txt
         grep -c "CPU architecture: 8" cpuinfo.txt
         grep -c 676974687562004b cpuinfo.txt
+  test_5:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ./ # pguyot/arm-runner-action@HEAD
+      with:
+        cpu_info: cpuinfo/raspberrypi_5
+        bind_mount_repository: true
+        cpu: cortex-a53
+        commands: |
+            cat /proc/cpuinfo > cpuinfo.txt
+    - name: Test content of cpuinfo
+      run: |
+        grep -c "CPU architecture: 8" cpuinfo.txt
+        grep -c 6769746875620050 cpuinfo.txt
+  test_cortex_a76:
+    # Ubuntu 24.04 comes with qemu >= 8.2 which does emulate /proc/cpuinfo
+    # on aarch64
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ./ # pguyot/arm-runner-action@HEAD
+      with:
+        bind_mount_repository: true
+        cpu: cortex-a76
+        commands: |
+            cat /proc/cpuinfo > cpuinfo.txt
+    - name: Test content of cpuinfo
+      run: |
+        grep -c "model name	: ARMv8 Processor rev 0 (v8l)" cpuinfo.txt
+        grep -c "CPU architecture: 8" cpuinfo.txt

.github/workflows/test-runner-images.yml

@@ -0,0 +1,22 @@
+name: Test runner images
+on:
+  push:
+    branches:
+      - 'main'
+      - 'releases/**'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        runner: ["ubuntu-20.04", "ubuntu-22.04", "ubuntu-24.04", "ubuntu-latest"]
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ./ # pguyot/arm-runner-action@HEAD
+      with:
+        commands: |
+            test `uname -m` = 'armv6l'

README.md

@@ -142,19 +142,22 @@ Raspberry Pi models. Code compiled for `arm1176` can be run on later 32 bits
 CPUs.
 
 The following values are specially processed:
--   `arm1176` equivalent to `arm1176:cortex-a53`.
--   `cortex-a7` equivalent to `cortex-a7:cortex-a53`. Optimized for later Pi
-    models (Pi 3/Pi 4 and Pi Zero 2). Not suitable for Pi 1/Pi 2/Pi Zero.
--   `cortex-a8` equivalent to `cortex-a8:max`.
--   `cortex-a53` equivalent to `max:cortex-a53`.
+- `arm1176` equivalent to `arm1176:cortex-a53`.
+- `cortex-a7` equivalent to `cortex-a7:cortex-a53`. Optimized for later Pi
+  models (Pi 3/Pi 4 and Pi Zero 2). Not suitable for Pi 1/Pi 2/Pi Zero.
+- `cortex-a8` equivalent to `cortex-a8:max`.
+- `cortex-a53` equivalent to `max:cortex-a53`.
+- `cortex-a76` equivalent to `max:cortex-a76`. Note that this requires a newer
+  version of qemu, for example with runner ubuntu 24.04. See `test_cortex_a76`
+  in [cpu_info test](.github/workflows/test-cpu_info.yml).
 
 Some software uses the output of `uname -m` or equivalent. This command is
 directly driven by this `cpu` option. You might want to compile 32 bits
 binaries with both `arm1176` which translates to `armv6l` and `cortex-a7` which
 translates to `armv7l`.
 
 For FPU and vector instruction sets, software usually automatically looks into
-`/proc/cpuinfo` or equivalent. This can be patched with `cpu_info` option.
+`/proc/cpuinfo` or equivalent. See `cpu_info` option below.
 
 Whether code is executed in 32 bits or 64 bits (and build generates 32 bits
 or 64 bits binaries) depend on the image. See _32 and 64 bits_ below.
@@ -192,20 +195,23 @@ from the target system.
 #### `cpu_info`
 
 Path to a fake cpu_info file to be used instead of `/proc/cpuinfo`. Default is
-to not fake the CPU (/proc/cpuinfo will report amd64 CPU of GitHub runner).
+to not fake the CPU. With older versions of qemu, including the one provided
+by ubuntu-latest as of this writing (ubuntu 22.04, qemu 6), `/proc/cpuinfo` is
+not intercepted and will report amd64 CPU of GitHub runner.
 
 Some software checks for features using `/proc/cpuinfo` and this option can be
 used to trick them. The path is relative to the action (to use pre-defined
 settings) or to the local repository.
 
 Bundled with the action are the following 32 bits CPU infos:
--   `cpuinfo/raspberrypi_zero_w`
--   `cpuinfo/raspberrypi_3b` (requires `cortex-a7` cpu)
--   `cpuinfo/raspberrypi_zero2_w` (requires `cortex-a7` cpu)
+- `cpuinfo/raspberrypi_zero_w`
+- `cpuinfo/raspberrypi_3b` (requires `cortex-a7` cpu)
+- `cpuinfo/raspberrypi_zero2_w` (requires `cortex-a7` cpu)
 
 As well as the following 64 bits CPU infos:
--   `cpuinfo/raspberrypi_4b`
--   `cpuinfo/raspberrypi_zero2_w_arm64`
+- `cpuinfo/raspberrypi_4b`
+- `cpuinfo/raspberrypi_zero2_w_arm64`
+- `cpuinfo/raspberrypi_5`
 
 On real hardware, the `/proc/cpuinfo` file content depends on the CPU being
 used in 32 bits or 64 bits mode, which in turn depends on the base image.
@@ -217,6 +223,10 @@ passed to `cpu` option. In particular, when using 32 bits `cpu_info`, the
 default emulated CPU for 32 bits may not work and you should set `cpu` option
 to `cortex-a7`.
 
+qemu 8.2 and higher do intercept `/proc/cpuinfo` to report something related
+to the passed cpu option. So if you are running ubuntu-24.04 or if you install
+your own version of qemu-user-arm/aarch64, this option will be effectless.
+
 #### `optimize_image`
 
 Zero-fill unused filesystem blocks and shrink root filesystem during final clean-up, to make any later

action.yml

@@ -96,8 +96,9 @@ runs:
   using: "composite"
   steps:
     - name: Install dependencies
-      run:
-        sudo apt-get update && sudo apt-get install -y qemu qemu-user-static binfmt-support parted wget dosfstools zip
+      run: |
+        sudo apt-get update && sudo apt-get install -y binfmt-support parted wget dosfstools zip
+        (test -x /usr/bin/qemu-arm-static && test -x /usr/bin/qemu-aarch64-static) || sudo apt install -y qemu-user-static
       shell: bash
     - name: Install qemu wrapper
       shell: bash
@@ -118,15 +119,18 @@ runs:
         cortex-a53)
             cpu="max:cortex-a53"
         ;;
+        cortex-a76)
+            cpu="max:cortex-a76"
+        ;;
         *)
             cpu=${{ inputs.cpu }}
         esac
         arm_cpu=${cpu%:*}
         aarch64_cpu=${cpu#*:}
         sudo gcc -static ${GITHUB_ACTION_PATH}/qemu-wrapper.c -DQEMU_CPU=${arm_cpu} -O3 -s -o /usr/bin/qemu-arm-static0
         sudo gcc -static ${GITHUB_ACTION_PATH}/qemu-wrapper.c -DQEMU_CPU=${aarch64_cpu} -O3 -s -o /usr/bin/qemu-aarch64-static0
-        sudo update-binfmts --unimport qemu-arm
-        sudo update-binfmts --unimport qemu-aarch64
+        sudo update-binfmts --unimport qemu-arm || echo "warning: could not unimport qemu-arm"
+        sudo update-binfmts --unimport qemu-aarch64 || echo "warning: could not unimport qemu-aarch64"
         sudo update-binfmts --package arm-runner-action --install arm-runner-action-qemu-arm /usr/bin/qemu-arm-static0 --magic '\x7f\x45\x4c\x46\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00' --mask '\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff' --credentials yes --fix-binary yes
         sudo update-binfmts --package arm-runner-action --install arm-runner-action-qemu-aarch64 /usr/bin/qemu-aarch64-static0 --magic '\x7f\x45\x4c\x46\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00' --mask '\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff' --credentials yes --fix-binary yes
 
@@ -302,8 +306,8 @@ runs:
         sudo update-binfmts --package arm-runner-action --remove arm-runner-action-qemu-aarch64 /usr/bin/qemu-aarch64-static0
         sudo rm /usr/bin/qemu-arm-static0
         sudo rm /usr/bin/qemu-aarch64-static0
-        sudo update-binfmts --import qemu-arm
-        sudo update-binfmts --import qemu-aarch64
+        sudo update-binfmts --import qemu-arm || echo "warning: could not import qemu-arm"
+        sudo update-binfmts --import qemu-aarch64 || echo "warning: could not import qemu-aarch64"
 branding:
   icon: 'cpu'
   color: 'purple'

cpuinfo/raspberrypi_5

@@ -0,0 +1,40 @@
+processor	: 0
+BogoMIPS	: 108.00
+Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
+CPU implementer	: 0x41
+CPU architecture: 8
+CPU variant	: 0x4
+CPU part	: 0xd0b
+CPU revision	: 1
+
+processor	: 1
+BogoMIPS	: 108.00
+Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
+CPU implementer	: 0x41
+CPU architecture: 8
+CPU variant	: 0x4
+CPU part	: 0xd0b
+CPU revision	: 1
+
+processor	: 2
+BogoMIPS	: 108.00
+Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
+CPU implementer	: 0x41
+CPU architecture: 8
+CPU variant	: 0x4
+CPU part	: 0xd0b
+CPU revision	: 1
+
+processor	: 3
+BogoMIPS	: 108.00
+Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
+CPU implementer	: 0x41
+CPU architecture: 8
+CPU variant	: 0x4
+CPU part	: 0xd0b
+CPU revision	: 1
+
+Hardware	: BCM2835
+Revision	: d04170
+Serial	: 6769746875620050
+Model	: Raspberry Pi 5 Model B Rev 1.0